Regenerative furnace



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RBGBNBRATIVB FURNAQBQ Patented sept'. 18, 1888.

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3 sheets-sheet (NofModel.)

W. 8v J. C. SWINDELL. RBGBNERATIVB PURNAGE.

Paten-ted Sept.

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W'. & J. C. .SWINDELL REGBNBRATIVB F'URNAGE. No. 889,671; y Paten-ted 88138.18, 1888.1

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UNrTEn 'STATES PATENT OFFICE.,

VILLIAM SWINDLL AND JOHN C. SWINDELL, 'OF

` PENNSYLVANIA.

ALLEGHENY,

REGENERATIVE FURNACE.

SPECIFICATION {ormingpart of Letters Patent No. 389,671, dated September 18, 1888.

Application filed August l, 1887. Serial No. 245,826. (No model.)

To all whom it may concern:

Be it known that we, WILLIAM SWINDELL and J oHN C. SWINDELL, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, citizens of the United States, have invented or discovered certain new and useful Improvements in Regenerative Furnaces, of which improvements the following is a speci-V ication.

The invention herein relates to certain improvements in gas-furnaces ofthe open-hearth type, and has for its object such a construction and arrangement of flues and regenerative chambers as will prevent the clogging up of the checker-work of said chambers by dust, slag, and other foreign materials; and it is a further object of the invention to provide for the simultaneous operation of all the valves necessary in a reversal of the furnace by the single movement of one lever.

In general terms, the invention consists in l the construction and combination of parts,sub

stantially as hereinafter more fully described and claimed.

In the accompanying drawings, forming a part of this specification, Figure 1 is a view, partly in plan and partly in section, of our improved construction of furnace. Fig. 2 is a sectional elevation, the section being taken on the line a." as, Fig. 1. Fig. 3 is asimilar view on the line y y, Fig. 1. Fig. 4 is asectional plan view taken on the line z a, Fig. 2. Fig. 5 is a sectional view on the line t z, Fig. 1.

The shell of the furnace is of the usual con struction as regards the general features thereof. Underneath the hearth 1, which is of the usual construction, are arranged the regenerative chambers 3 and 4, formed by the wall 5, separating the chambers and forming the central support for the arch 7, which in turn supl ports the hearth and the bridge-walls 6, preferably located at short distances inside of the ends of the hearth, as shown in Fig. 2. The chambers 8 and 9, formed by thebridge-walls 6 and the outer walls of the furnace, are con nected by the i'lues 10 and 11,0f the usual form and construction, with the meltingchamber. At the ends of the arch 7, forming the top of the chambers 3, 4, 8, and 9, are formed the depending walls 12, which are extensions of the inner walls of the dues 10 and 11 and pro ject downwardly a sufficient distance to cause the gas or air in its iow from the meltingchamber to the regenerative chambers, or vice Versa, to pass down into the chambers 8 and 9, thereby causing such a stoppage or change of ow in the gas or air that dust and other foreign substances will be separated therefrom and deposited in the chambers 8 and 9, from which such deposit can be removed through the doors 13, formed in the outer walls ot' the furnace for that purpose.

From the regenerative chambers 3 and 4 extend the dues 14 and 15, arranged alongside of each other and uniting a short distance from the furnace with the line 16, leading to the stack 17. (See Figs. 2 and 4.) v ln the tops of these tlues,near the furnace,are formed openings 18 for the iniow of air, which is regulated by the valve-plate 20, adapted to alternately cover each of the openings 18. This valveplate is supported on both sides by grooved wheels 21,mounted on small rails 22,arranged alongside of the openings 18. (See Figs. 1 and 2.)

lThe flow of the products of combustion from the regenerative chambers to the stack is regulated by the valve-plate 28, arranged to move transversely of the fines 14 and 15 at a point between the openings 8 in the tlues and their junction with the flue 1G. A suitable slit is formed through the top of the dues and the wall separating them, vso as to permit of the traverse of the valveplate from one ue to the other. The upper end of the valve-plate projects up through the slit in the top wall of the ues and is supported by the shafts con necting the grooved wheels 24, which are mounted on rails 25 on each side of the slit. The valve-plates 20 and 23 are connected together in such relation to each other by chains orother flexible connections,26,passingaround guide-pulleys 27, that motion imparted to either valve will simultaneousl y shift the other in the opposite direction, and`that when the valve-plate 20 covers the opening into one of the dues, as 14, the valve plate 23 will close the other flue, as 15, and vice versa. The operating -lever 28, which projects up through the charging-door 29, can be connected to l l l IOO either of the valve-plates, which, as before stated, are firmly connected together.

It will be readily understood from the above that a reversal of the operation is quickly effected by a single movement of the operatinglever. As the valves are formed of plain cust or wrought iron plates, they can easily he changed and renewed. As the valve 23 in its movements is shifted entirely from one flue to the other, it will be protected from the direct impact of the products of combustion on their way to the stack.

Gas is introduced into the furnace through the pipes 30, projecting through the outer walls of the fines l0 and l1.

Although a platevalve is for many purposes the preferable form, we do not wish to limit ourselves to such construction, as in many cases other forms are equally applicable.

XVe claim herein as our invention- 2o In a regenerative furnace, the combination of (lues extending from the regenerative chambers and connected to a stack, each flue being provided with an air-inlet, a valve for closing the inlet of one flue and opening the inlet of 25 the other flue, a second valve for alternately connecting said ues with the stack, and a connection from one valve to the other, whereby the movement of either will simultaneously shift the other in the opposite direction, sub- 3o stantially as set forth.

In testimony' whereof we have hereunto set our hands.

WILLIAM SWINDELL. JOHN C. SWINDELL. Witnesses:

DARWIN S. WoLoo'r'r, R. H. WHITTLESEY. 

